EP2099444A1 - Utilisation de dérivés de la d-sérine pour le traitement de troubles de l'anxiété - Google Patents

Utilisation de dérivés de la d-sérine pour le traitement de troubles de l'anxiété

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Publication number
EP2099444A1
EP2099444A1 EP07855538A EP07855538A EP2099444A1 EP 2099444 A1 EP2099444 A1 EP 2099444A1 EP 07855538 A EP07855538 A EP 07855538A EP 07855538 A EP07855538 A EP 07855538A EP 2099444 A1 EP2099444 A1 EP 2099444A1
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EP
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Prior art keywords
chosen
alkyl
difluoromethoxy
compound
solvate
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EP07855538A
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German (de)
English (en)
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EP2099444A4 (fr
Inventor
Guy Higgins
Abdelmalik Slassi
Methvin Isaac
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Shire NPS Pharmaceuticals Inc
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NPS Pharmaceuticals Inc
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Publication of EP2099444A1 publication Critical patent/EP2099444A1/fr
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Withdrawn legal-status Critical Current

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K31/00—Medicinal preparations containing organic active ingredients
    • A61K31/16—Amides, e.g. hydroxamic acids
    • A61K31/165—Amides, e.g. hydroxamic acids having aromatic rings, e.g. colchicine, atenolol, progabide
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D333/00—Heterocyclic compounds containing five-membered rings having one sulfur atom as the only ring hetero atom
    • C07D333/02—Heterocyclic compounds containing five-membered rings having one sulfur atom as the only ring hetero atom not condensed with other rings
    • C07D333/04—Heterocyclic compounds containing five-membered rings having one sulfur atom as the only ring hetero atom not condensed with other rings not substituted on the ring sulphur atom
    • C07D333/06—Heterocyclic compounds containing five-membered rings having one sulfur atom as the only ring hetero atom not condensed with other rings not substituted on the ring sulphur atom with only hydrogen atoms, hydrocarbon or substituted hydrocarbon radicals, directly attached to the ring carbon atoms
    • C07D333/22—Radicals substituted by doubly bound hetero atoms, or by two hetero atoms other than halogen singly bound to the same carbon atom
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K31/00—Medicinal preparations containing organic active ingredients
    • A61K31/33—Heterocyclic compounds
    • A61K31/38—Heterocyclic compounds having sulfur as a ring hetero atom
    • A61K31/381—Heterocyclic compounds having sulfur as a ring hetero atom having five-membered rings
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P25/00—Drugs for disorders of the nervous system
    • A61P25/22—Anxiolytics
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C233/00—Carboxylic acid amides
    • C07C233/01—Carboxylic acid amides having carbon atoms of carboxamide groups bound to hydrogen atoms or to acyclic carbon atoms
    • C07C233/02—Carboxylic acid amides having carbon atoms of carboxamide groups bound to hydrogen atoms or to acyclic carbon atoms having nitrogen atoms of carboxamide groups bound to hydrogen atoms or to carbon atoms of unsubstituted hydrocarbon radicals
    • C07C233/11—Carboxylic acid amides having carbon atoms of carboxamide groups bound to hydrogen atoms or to acyclic carbon atoms having nitrogen atoms of carboxamide groups bound to hydrogen atoms or to carbon atoms of unsubstituted hydrocarbon radicals with carbon atoms of carboxamide groups bound to carbon atoms of an unsaturated carbon skeleton containing six-membered aromatic rings
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C233/00—Carboxylic acid amides
    • C07C233/01—Carboxylic acid amides having carbon atoms of carboxamide groups bound to hydrogen atoms or to acyclic carbon atoms
    • C07C233/12—Carboxylic acid amides having carbon atoms of carboxamide groups bound to hydrogen atoms or to acyclic carbon atoms having the nitrogen atom of at least one of the carboxamide groups bound to a carbon atom of a hydrocarbon radical substituted by halogen atoms or by nitro or nitroso groups
    • C07C233/15—Carboxylic acid amides having carbon atoms of carboxamide groups bound to hydrogen atoms or to acyclic carbon atoms having the nitrogen atom of at least one of the carboxamide groups bound to a carbon atom of a hydrocarbon radical substituted by halogen atoms or by nitro or nitroso groups with the substituted hydrocarbon radical bound to the nitrogen atom of the carboxamide group by a carbon atom of a six-membered aromatic ring
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C233/00—Carboxylic acid amides
    • C07C233/01—Carboxylic acid amides having carbon atoms of carboxamide groups bound to hydrogen atoms or to acyclic carbon atoms
    • C07C233/45—Carboxylic acid amides having carbon atoms of carboxamide groups bound to hydrogen atoms or to acyclic carbon atoms having the nitrogen atom of at least one of the carboxamide groups bound to a carbon atom of a hydrocarbon radical substituted by carboxyl groups
    • C07C233/46—Carboxylic acid amides having carbon atoms of carboxamide groups bound to hydrogen atoms or to acyclic carbon atoms having the nitrogen atom of at least one of the carboxamide groups bound to a carbon atom of a hydrocarbon radical substituted by carboxyl groups with the substituted hydrocarbon radical bound to the nitrogen atom of the carboxamide group by an acyclic carbon atom
    • C07C233/51—Carboxylic acid amides having carbon atoms of carboxamide groups bound to hydrogen atoms or to acyclic carbon atoms having the nitrogen atom of at least one of the carboxamide groups bound to a carbon atom of a hydrocarbon radical substituted by carboxyl groups with the substituted hydrocarbon radical bound to the nitrogen atom of the carboxamide group by an acyclic carbon atom having the carbon atom of the carboxamide group bound to an acyclic carbon atom of a carbon skeleton containing six-membered aromatic rings
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C271/00—Derivatives of carbamic acids, i.e. compounds containing any of the groups, the nitrogen atom not being part of nitro or nitroso groups
    • C07C271/06—Esters of carbamic acids
    • C07C271/08—Esters of carbamic acids having oxygen atoms of carbamate groups bound to acyclic carbon atoms
    • C07C271/10—Esters of carbamic acids having oxygen atoms of carbamate groups bound to acyclic carbon atoms with the nitrogen atoms of the carbamate groups bound to hydrogen atoms or to acyclic carbon atoms
    • C07C271/22—Esters of carbamic acids having oxygen atoms of carbamate groups bound to acyclic carbon atoms with the nitrogen atoms of the carbamate groups bound to hydrogen atoms or to acyclic carbon atoms to carbon atoms of hydrocarbon radicals substituted by carboxyl groups
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C311/00—Amides of sulfonic acids, i.e. compounds having singly-bound oxygen atoms of sulfo groups replaced by nitrogen atoms, not being part of nitro or nitroso groups
    • C07C311/30—Sulfonamides, the carbon skeleton of the acid part being further substituted by singly-bound nitrogen atoms, not being part of nitro or nitroso groups
    • C07C311/45—Sulfonamides, the carbon skeleton of the acid part being further substituted by singly-bound nitrogen atoms, not being part of nitro or nitroso groups at least one of the singly-bound nitrogen atoms being part of any of the groups, X being a hetero atom, Y being any atom, e.g. N-acylaminosulfonamides
    • C07C311/46—Y being a hydrogen or a carbon atom

Definitions

  • the present disclosure relates the use serine derivatives, to processes for their preparation, to pharmaceutical compositions containing them, and to their usefulness in the treatment of anxiety disorders.
  • Anxiety is broadly defined as a state of unwarranted or inappropriate worry often accompanied by restlessness, tension, distraction, irritability and sleep disturbances. This disproportionate response to environmental stimuli can hyperactivate the hypothalamic-pituitary-adrenal axis and the autonomic nervous system, resulting in somatic manifestation of anxiety, including shortness of breath, sweating, nausea, rapid heartbeat and elevated blood pressure (Sanford et al. Pharmacol. Ther. 2000, 88: 197-212).
  • Anxiety disorders represent a range of conditions and as a result have been classified into multiple distinct conditions, including generalized anxiety disorder (GAD), panic attack, post traumatic stress disorder (PTSD), obsessive compulsive disorder (OCD) and social phobias (Sanford et al. Acta. Psychiatr. Scand. Suppl. 1998, 393: 74-80).
  • GAD generalized anxiety disorder
  • PTSD post traumatic stress disorder
  • OCD obsessive compulsive disorder
  • social phobias Sanford et al. Acta. Psychiatr. Scand. Suppl. 1998, 393: 74-80.
  • GAD Generalized anxiety disorder
  • Panic Disorder is a well-studied psychiatric condition that consists of multiple disabling panic attacks characterized by and intense autonomic arousal. In addition, heightened fear and anxiety states occur both during and between panic attacks. Approximately 3% of woman and 1.5% of men have panic attacks. During a panic attack, the individual experiences multiple symptoms including light-headedness, a pounding heart and difficulty in breathing. Panic disorder may be caused by an oversensitive brain system regulating autonomic functions. Potential brain regions involved in panic attack are the locus ceruleus, hippocampus and amygdala. Pathophysiology in the brain GABA-benzodiazepine receptor system may also contribute to the production of panic attack.
  • Post traumatic stress disorder is another example of a disorder associated with intense fear and anxiety states that require psychiatric treatment.
  • PSTD results from exposure to a life threatening or traumatic event.
  • Individuals with PSDT have recurring thoughts of the cosmic event. Reenactment of the event varies in duration from a few seconds or hours to several days.
  • Individuals with major depression, with panic disorders or lacking strong social supports are vulnerable to develop PTSD
  • Anxiety disorders which occur in 10% to 30 % of the population, represent not only a significant public health issue but place a substantial economic burden on society.
  • a number of drugs have either been developed or are being developed for treating the different subclasses of anxiety.
  • Some of these agents such as tricyclic antidepressants and b-adrenoreceptor antagonists found either limited use in treating specific disorders such as performance anxiety (e.g., b-adrenoreceptor antagonists suppression of the sympathetic manifestations of anxiety) or have fallen out of favor for reasons of efficacy and/or safety.
  • Benzodiazepines act by positively modulating the inhibitory neurotransmitter GABA through an allosteric site on the GABA A receptor complex, a ligand-gated chloride ion channel. Nonetheless, the use of benzodiazepines is limited by side effects associated with enhanced GABAergic neurotransmission, manifesting as sedation, muscle relaxation, amnesia and ataxia.
  • the present invention is directed to the D-serine analogs for the treatment of anxiety disorders such as generalized anxiety disorder (GAD), panic attack, post traumatic stress disorder (PTSD), obsessive compulsive disorder (OCD) and social phobias.
  • anxiety disorders such as generalized anxiety disorder (GAD), panic attack, post traumatic stress disorder (PTSD), obsessive compulsive disorder (OCD) and social phobias.
  • GAD generalized anxiety disorder
  • PTSD post traumatic stress disorder
  • OCD obsessive compulsive disorder
  • social phobias social phobia
  • A is chosen from: aryl or heteroaryl, A being optionally substituted with up to 5 independently-selected groups R 8 ;
  • R 1 is chosen from: alkyl or haloalkyl;
  • R 2 is chosen from: H, C(O)R 6 , C(O)OR 6 , SO 2 R 6 or C(O)NR 6 R 7 ;
  • R 3 , R 4 and R 5 are independently chosen from: H or alkyl;
  • R 6 and R 7 are independently chosen from: H or alkyl; and
  • R 8 is chosen from: OH, CN, halo, alkyl, alkoxy, haloalkyl, haloalkoxy, C(O)R 6 , C(O)OR 6 , SO 2 R 6 or C(O)NR 6 R 7 ;
  • GAD generalized anxiety disorder
  • PTSD post traumatic stress disorder
  • OCD obsessive compulsive disorder
  • social phobias such as generalized anxiety disorder (GAD), panic attack, post traumatic stress disorder (PTSD), obsessive compulsive disorder (OCD) and social phobias.
  • GAD generalized anxiety disorder
  • PTSD post traumatic stress disorder
  • OCD obsessive compulsive disorder
  • social phobias social phobia
  • compositions are provided containing the present compounds in amounts for pharmaceutical use to treat medical conditions such as anxiety disorders such as generalized anxiety disorder (GAD), panic attack, post traumatic stress disorder (PTSD), obsessive compulsive disorder (OCD) and social phobias; such compositions comprise a compound of Formula I in association with one or more pharmaceutically acceptable diluents, excipients and/or inert carriers.
  • GAD generalized anxiety disorder
  • PTSD post traumatic stress disorder
  • OCD obsessive compulsive disorder
  • social phobias such as social phobias.
  • alkyl as used herein means a straight- or branched-chain hydrocarbon radical having from one to six carbon atoms, and includes methyl, ethyl, propyl, isopropyl, t-butyl and the like.
  • alkoxy as used herein means a straight- or branched-chain alkoxy radical having from one to six carbon atoms and includes methoxy, ethoxy, propyloxy, isopropyloxy, t-butoxy and the like.
  • halo as used herein means halogen and includes fluoro, chloro, bromo, iodo and the like, in both radioactive and non-radioactive forms.
  • haloalkyl as used herein means an alkyl group in which at least one H atom has been replaced by a halo atom, and includes groups such as CF 3 , CH 2 Br and the like.
  • haloalkoxy as used herein means an alkoxy group in which at least one H atom has been replaced by a halo atom, and includes groups such as OCF 3 , OCH 2 Br and the like.
  • aryl as used herein means an aromatic group having five to twelve atoms, and includes phenyl, naphthyl and the like.
  • heteroaryl means an aromatic group which includes at least one heteroatom selected from at least one of the following: N, S and O, and includes groups and includes pyridyl, indolyl, furyl, benzofuryl, thienyl, benzothienyl, quinolyl, oxazolyl and the like.
  • One embodiment of the disclosure provides compounds of Formula I, or a salt or solvate thereof, for the treatment of anxiety disorders such as generalized anxiety disorder (GAD), panic attack, post traumatic stress disorder (PTSD), obsessive compulsive disorder (OCD) and social phobias.
  • GAD generalized anxiety disorder
  • PTSD post traumatic stress disorder
  • OCD obsessive compulsive disorder
  • social phobias social phobias.
  • A is chosen from: aryl or heteroaryl, optionally substituted with up to 5 independently-selected groups R 8 ;
  • R 1 is chosen from: alkyl or haloalkyl
  • R 2 is chosen from: C(O)R 6 , C(O)OR 6 , SO 2 R 6 or C(O)NR 6 R 7 ;
  • R 3 , R 4 and R 5 are independently chosen from: H or alkyl; R 6 and R 7 are independently chosen from: H or alkyl; and
  • R 8 is chosen from: OH, CN, halo, alkyl, alkoxy, haloalkyl, haloalkoxy, C(O)R 6 ,
  • R 1 is a haloalkyl group, or a salt or solvate thereof for the treatment of anxiety disorders such as generalized anxiety disorder (GAD), panic attack, post traumatic stress disorder (PTSD), obsessive compulsive disorder (OCD) and social phobias.
  • GAD generalized anxiety disorder
  • PTSD post traumatic stress disorder
  • OCD obsessive compulsive disorder
  • social phobias such as social phobias.
  • haloalkyl group (R 1 ) brings about dramatic changes in the physical and chemical properties of the molecules as compared to the analogous parent alkyl compounds, and can result in the enhancement of pharmacokinetic properties and biological activities.
  • the unique properties of the fluorine atom include it small size, low polarizability, high electronegativity and its ability to form strong bonds with carbon.
  • bioactive compounds containing trifluoromethoxy, difluoromethoxy and fluoromethoxy groups have attracted great interest. Replacement of hydrogen atoms can sometimes result in improved thermal and metabolic stability. Improved metabolic stability is usually a desirable feature since the possibility exists that in vivo decomposition may produce toxic effects.
  • Exemplary compounds useful in the practice of the invention include, but is not limited to:
  • WO 97/33861 discloses related compounds in which R 1 is alkyl, such as lacosamide:
  • Fluoro methyl ether derivatives [Manson et al J. Am. Chem. Soc. 1956, 78: 1682] can be obtained from the corresponding chloro analogs by nucleophilic substitution with KF. Chloromethylethers are readily accessible [Hayashi et al Bull. Chem. Soc. Jpn 1980, 53: 2701; Marvel et al Org. Syn. Coll. Vol. 1941, 1: 369; Davis et al Org. Synth. 1967, 47: 123.; Sharma et al J. Org. Chem. 1968, 33: 3335.; Hayami et al Bull. Chem. Soc. Jpn 1971, 44: 3091].
  • the O- ⁇ -fluoro alkyl ethers can be most conveniently prepared from the reaction of the vinyl ether with N- Bromosuccinimide (NBS) in the presence of HF followed by reductive debromination.
  • the O- ⁇ , ⁇ -difluoro alkyl ethers can be prepared by electrophilic reactions of the appropriate alkoxide anion with Chlorodifluoromethylation in the presence of base [Clark et al J. Am. Chem. Soc. 1955, 77: 6618; Miller et al J. Org. Chem. 1960, 25: 2009, Sharma et al J. Fluorine. Chem. 1988, 41 : 247]; difluorocarbene [Naumann et al J. Fluorine. Chem. 1994, 67: 91; Naumann et al Liebigs. Ann. 1995, 1717-1719] and difluoromethylcarbocation equivalent [Uneyama et al Tetrahedron Lett. 1993, 34: 1311; Uneyama et al J. Org. Chem. 1995, 60: 370;].
  • the difluoromethyl ethers could also be accessible by sulfur tetrafluoride mediated fluorodeoxygenation of formates [Sheppard et al J. Org. Chem. 1964, 29: 1], or from the treatment of the alcohol with Iododifluoromethyl phenyl sulphone to give the corresponding ether which can undergo reductive desulphonylation [Olah et al Org. Lett. 2005, 6: 4315].
  • the O- ⁇ , ⁇ , ⁇ -trifluoro alkyl ethers can be prepared by a recently disclosed fluorodesulfurization involving the treatment of dithiocarbonates (xanthogenates) with excess HF/Pyridine and l,3-dibromo-5,5-dimethylhydantoin.
  • the trifluoromethyl ethers are usually formed in moderate to excellent yield [Kanie et al Bull. Chem. Soc. Jpn 2000, 73: 471; Kanie et al Adv. Synth. C ⁇ t ⁇ l. 2001, 343: 235].
  • Alkyl trifluoromethyl ethers can also be prepared by (1) treating alkyfluoroformates with SF4 [Sheppard et al J. Org. Chem. 1964, 29: H]; (2) trifluoromethyl transfer from O-(trifluoromethyl) dibenzofuranium tetrafluoroborate [Umemoto, T. Chem. Rew. 1996, 96: 1757] and (3) the addition of trifluoromethyl hypofluorite (FOCF3) to alkenes[Rozen, S. Chem. Rew. 1996, 96: 1717] .
  • SF4 Sheppard et al J. Org. Chem. 1964, 29: H
  • trifluoromethyl transfer from O-(trifluoromethyl) dibenzofuranium tetrafluoroborate Umemoto, T. Chem. Rew. 1996, 96: 1757
  • FOCF3 trifluoromethyl hypofluorite
  • individual compounds of Formula II below may be prepared according to various methods described above utilizing the appropriately protected series as the representative alcohol precursor.
  • a compound of Formula I wherein R 1 is lower alkyl, CHF 2 , CFH 2 or halogenated alkyl, and A is aryl, substituted aryl, alkyl or heteroaryl etc. can be prepared as shown in Scheme 1, below.
  • the corresponding benzyl-ester 3 can be converted to the difluoromethoxy derivative utilizing difluoromethylating agents such as FSO 2 CF 2 COOH or CF 3 ZnBr.2CH 3 CN, followed by deprotection conditions (e.g. shown is hydrogenation) to afford the difluoromethoxyserine precursor 4.
  • difluoromethylating agents such as FSO 2 CF 2 COOH or CF 3 ZnBr.2CH 3 CN
  • deprotection conditions e.g. shown is hydrogenation
  • a further embodiment provides a method for preparing a compound according to Scheme 4, below:
  • the compounds disclosed are, for instance, administered orally, sublingually, rectally, nasally, vaginally, topically (including the use of a patch or other transdermal delivery device), by pulmonary route by use of an aerosol, or parenterally, including, for example, intramuscularly, subcutaneously, intraperitoneally, intra-arterially, intravenously or intrathecally. Administration can be by means of a pump for periodic or continuous delivery.
  • the compounds disclosed are administered alone, or are combined with a pharmaceutically- acceptable carrier or excipient according to standard pharmaceutical practice.
  • the compounds disclosed are used in the form of tablets, capsules, lozenges, chewing gum, troches, powders, syrups, elixirs, aqueous solutions and suspensions, and the like.
  • carriers that are used include lactose, sodium citrate and salts of phosphoric acid.
  • Various disintegrants such as starch, and lubricating agents such as magnesium stearate and talc, are commonly used in tablets.
  • useful diluents are lactose and high molecular weight polyethylene glycols. If desired, certain sweetening and/or flavoring agents are added.
  • sterile solutions of the compounds of the invention are usually prepared, and the pHs of the solutions are suitably adjusted and buffered.
  • the total concentration of solutes should be controlled to render the preparation isotonic.
  • ointments or droppable liquids may be delivered by ocular delivery systems known to the art such as applicators or eye droppers.
  • Such compositions can include mucomimetics such as hyaluronic acid, chondroitin sulfate, hydroxypropyl methylcellulose or polyvinyl alcohol, preservatives such as sorbic acid, EDTA or benzylchromium chloride, and the usual quantities of diluents and/or carriers.
  • diluents and/or carriers will be selected to be appropriate to allow the formation of an aerosol.
  • Suppository forms of the compounds disclosed are useful for vaginal, urethral and rectal administrations.
  • Such suppositories will generally be constructed of a mixture of substances that is solid at room temperature but melts at body temperature.
  • the substances commonly used to create such vehicles include theobroma oil, glycerinated gelatin, hydrogenated vegetable oils, mixtures of polyethylene glycols of various molecular weight and fatty acid esters of polyethylene glycol. See, Remington's Pharmaceutical Sciences, 16th Ed., Mack Publishing, Easton, PA, 1980, pp. 1530-1533 for further discussion of suppository dosage forms.
  • Analogous gels or creams can be used for vaginal, urethral and rectal administrations.
  • Examples of pharmaceutically acceptable acid addition salts for use with the compounds disclosed include those derived from mineral acids, such as hydrochloric, hydrobromic, phosphoric, metaphosphoric, nitric and sulfuric acids, and organic acids, such as tartaric, acetic, citric, malic, lactic, fumaric, benzoic, glycolic, gluconic, succinic, p-toluenesulphonic and arylsulphonic acids, for example.
  • Examples of pharmaceutically acceptable base addition salts for use with the compounds disclosed include those derived from non-toxic metals such as sodium or potassium, ammonium salts and organoamino salts such as triethylamine salts. Numerous appropriate such salts will be known to those of ordinary skill.
  • the physician or other health care professional can select the appropriate dose and treatment regimen based on the subject's weight, age, and physical condition. Dosages will generally be selected to maintain a serum level of compounds of the invention between about 0.01 ⁇ g/cc and about 1000 ⁇ g/cc, preferably between about 0.1 ⁇ g/cc and about 100 ⁇ g/cc.
  • an alternative measure of an exemplary amount is from about 0.001 mg/kg to about 10 mg/kg (alternatively, from about 0.01 mg/kg to about 10 mg/kg), such as from about 0.01 mg/kg to about 1 mg/kg (from about 0.1 mg/kg to about 1 mg/kg), will be administered.
  • an alternative measure of administration amount is from about 0.001 mg/kg to about 10 mg/kg (from about 0.1 mg/kg to about 10 mg/kg), such as from about 0.01 mg/kg to about 1 mg/kg (from about 0.1 mg/kg to about 1 mg/kg).
  • an alternative measure of administration amount is from about 0.1 mg/kg to about 10 mg/kg, such as from about 0.1 mg/kg to about 1 mg/kg.
  • Methyl serine hydrochloride (15 g, 0.096 mol) was stirred with potassium carbonate (66.6 g, 0.482 mol) and benzyl bromide (41.2 g, 0.24 mol) in acetonitrile (240 mL) at room temperature for 24 hours.
  • the reaction mixture was filtered and washed with ethyl acetate.
  • the filtrate was concentrated with silica gel.
  • the product was purified by column chromatography, eluting with 5-20 % ethyl acetate in hexanes, to give methyl 2-(dibenzylamino)-3-hydroxypropanoate (27 g, 93.5 %) as a pale- yellow sticky oil.
  • Methyl 2-dibenzylamino-3-difluoromethoxy-propionate (1.2 g, 3.43 mmol) was stirred with IN LiOH (10.3 mL, 10.3 mmol) in THF (40 mL) at 50 0 C for 2 hours and then stirred at room temperature overnight.
  • the reaction mixture was diluted with ethyl acetate and acidified with IN HCl.
  • the organic layer was dried with sodium sulfate and concentrated with silica gel.
  • Example 11.1 2-(Acetylamino)-N-(3,4-difluorobenzyl)-3-(difluoromethoxy) propan- amide
  • (2R)-2-Amino-3-(difluoromethoxy)propanoic acid (680 mg, 4.39 mmol) was mixed with sodium bicarbonate (738 mg. 8.78 mmol) and acetic anhydride (491 mg, 4.82 mmol) in water (10 mL) and dioxane (10 mL) at 0 0 C to room temperature overnight.
  • the reaction mixture was acidified with IN HCl to pH 2, concentrated and extracted with ethyl acetate, and concentrated again to give (2R)-2- (Acetylamino)-3-(difluoromethoxy) propanoic acid (580 mg, 82.3 %) as a colorless sticky oil.
  • the first CS-UCS was at approximately lOmin (range 5-15min) and the second CS-UCS pairing at approximately 30min (range 25-35min) within the test session.
  • the number of lever presses recorded during the two 2min CS periods (response A), and the number of lever presses recorded in the 2min periods immediately prior to the two CS periods (response B) were measured and a suppression ratio (SR) was calculated according to the formula (A/A+B).
  • SR suppression ratio
  • SR value was typically 0-0.1 and established anti-anxiety agents such as diazepam increased this value to 0.4-0.5 (for literature examples see Stanhope and Dourish (1996) Psychopharmacol. 128: 293-303; Mirza et al (2005) Psychopharmacol. 180: 159-168).
  • the total number of lever presses emitted by the animals over the 40min test session was measured.
  • Drug testing was conducted according to a repeated measures design, with each animal receiving each dose of drug treatment or vehicle control in a balanced design. Typically drug testing was conducted on Tuesdays and Fridays, with the animals drug untreated but otherwise run for baseline purposes. In each experiment a standard dose of diazepam (2mg/kg i.p) was included as a positive control.
  • Lacosamide((+)-(2i?)-2-(acetylamino)-N-benzyl-3-methoxypropanamide) demonstrated efficacy in the CER assay by significantly increasing the SR value from doses 3-30mg/kg i.p. The magnitude of this effect was equivalent to diazepam (2mg/kg i.p). The (S)-enantiomer of Lacosamide was ineffective in this assay.
  • mice Male, experimentally na ⁇ ve CD-I mice of body weight range 25-35g were used in these studies. Following a pretreatment with test drug or vehicle control the animals were singly placed within a Perspex chamber of dimension (48cm x 28cm x 20cm; L x W x H) containing fresh sawdust bedding onto which 22 marbles were evenly spaced on the surface. After a 30min period, the mice were removed and the number of marbles that were covered by at least 2/3rd by sawdust were counted as buried. Typically mice will bury a significant proportion of the marbles, probably to hide the potential threat posed by the marbles which represent a novel stimulus to the animal.
  • Lacosamide demonstrated efficacy in the marble burying assay by significantly reducing the number of marbles buried compared to vehicle pretreated controls at oral doses of 3- 30mg/kg.
  • the (S)-enantiomer of Lacosamide was ineffective in this assay.

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  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

Les composés représentés par la Formule I sont utiles pour le traitement de troubles de l'anxiété, tels que le trouble de l'anxiété généralisée (TAG), l'attaque de panique, le trouble de stress post-traumatique (SPT), le trouble obsessionnel compulsif(TOC) et les phobies sociales. Formule dans laquelle : A est choisi parmi : aryle ou hétéroaryle, A étant facultativement substitué par jusqu'à 5 groupes R8 choisis de façon indépendante ; R1 est choisi parmi : alkyle ou haloalkyle ; R2 est choisi parmi : H, C(O)R6, C(O)OR6, SO2R6 ou C(O)NR6R7 ; R3, R4 et R5 sont indépendamment choisis parmi : H ou alkyle ; R6 et R7 sont indépendamment choisis parmi : H ou alkyle ; et R8 est choisi parmi : OH, CN, halo, alkyle, alcoxy, haloalkyle, haloalcoxy, C(O)R6, C(O)OR6, SO2R6 ou C(O)NR6R7.
EP07855538A 2006-12-14 2007-12-14 Utilisation de dérivés de la d-sérine pour le traitement de troubles de l'anxiété Withdrawn EP2099444A4 (fr)

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PCT/CA2007/002256 WO2008070994A1 (fr) 2006-12-14 2007-12-14 Utilisation de dérivés de la d-sérine pour le traitement de troubles de l'anxiété

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US20100016403A1 (en) 2010-01-21
WO2008070994A1 (fr) 2008-06-19
CA2672494A1 (fr) 2008-06-19
EP2099444A4 (fr) 2012-11-07
US20140018549A1 (en) 2014-01-16
US8450336B2 (en) 2013-05-28

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